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Some more really small amps
Some more really small amps
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Old 5th December 2014, 12:47 PM   #1
IO390 is offline IO390  United Kingdom
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Default Some more really small amps

New version now available.

Specifications:

-Size: 1.5”x1” (38x25mm)
-Input voltage range: 4.5-24V
-Efficiency: 90%
-Power: Limited to 2x21W(8Ω) 2x52W(4Ω) @ THD:10% (22V).
-Minimum THD: 0.05% at 0-2W
-Standby current: 50mA
-Sensitivity: 1Vp-p (@20dB)
-Gain: 20dB/32dB (selectable)
-Input impedance: 60KΩ (20dB), 15KΩ (32dB)
-Minimum load impedance: 1.6Ω

Features:

-DC offset detection at output to prevent speaker damage
-No ‘phone buzz’
-Includes comprehensive instruction manual.
-Hand assembled and tested in the UK
-No turn on pop
-Full L-C output filter with EMI snubbers
-Optional differential inputs (selectable on the board)
-Microcontroller on board for error reporting and precise turn on delay
-Status LED. Solid light when amp is “on”, flashes when amp reports a fault

Full specs and info on my store page: http://www.io390.co.uk/product/25w-amplifier-v2

Price is 24.99 plus postage and includes a full set of connectors.

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Thanks for looking!
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Last edited by IO390; 11th May 2015 at 02:00 PM.
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Old 5th December 2014, 01:26 PM   #2
Max Headroom is offline Max Headroom  Australia
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Quote:
Originally Posted by IO390 View Post
They have tighter bass than the previous version with ferrite beads, which had a "deeper" sound.
Yup, that's the sound of ferrite, IME/IMO the spoiler for class D amplifiers.
Ditto, ferrite cored crossover inductors.
Nice design/implementation.

Dan.
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Old 5th December 2014, 01:31 PM   #3
Slothrop is offline Slothrop  United States
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That sure is a cute little amp. Makes me want to build some sort of project around it.
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Old 5th December 2014, 02:51 PM   #4
von Ah is offline von Ah  United States
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That looks great. Nice work! However, this thread should go in the commercial section of the forum.
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Old 5th December 2014, 03:12 PM   #5
Saturnus is offline Saturnus  Denmark
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Indeed. It probably should.
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Old 5th December 2014, 03:14 PM   #6
IO390 is offline IO390  United Kingdom
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Good point. Could a mod please move it for me? Or should I delete it and make a new one?
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Old 7th December 2014, 12:56 PM   #7
von Ah is offline von Ah  United States
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A moderator will move it when they get a chance, I'm sure. I don't think you need to delete the thread. If you haven't already, you can click the red triangle 'report' icon under your username on the left side to call their attention to your last post.
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Old 7th December 2014, 01:14 PM   #8
IO390 is offline IO390  United Kingdom
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Cheers. Well I already started a new post in the "Vendors Bazaar" section, so if I hear nothing from a mod I'll go ahead and delete this one. Or perhaps I can edit the OP and just make it a thread regarding the TPA3132.
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Old 7th December 2014, 02:18 PM   #9
xrk971 is online now xrk971  United States
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Some more really small amps
Very nice work! Those sure are cute and would be great in almost any portable app. This would be one heck of a headphone amp (5v supply) for someone wanting to make their own cans using 2in fullrange drivers! Vifa TC6FD hmm....

What does shipping to US cost?

Last edited by xrk971; 7th December 2014 at 02:24 PM.
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Old 7th December 2014, 02:38 PM   #10
IO390 is offline IO390  United Kingdom
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Quote:
Originally Posted by xrk971 View Post
Very nice work! Those sure are cute and would be great in almost any portable app. This would be one heck of a headphone amp (5v supply) for someone wanting to make their own cans using 2in fullrange drivers! Vifa TC6FD hmm....

What does shipping to US cost?
Thanks for the kind words

Shipping to the US is 3.50 ($5 roughly) for 5-7 day. Anything quicker is a lot more expensive. Info on shipping is on my shop page.
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